Mercurial > hg > truffle
annotate src/share/vm/runtime/simpleThresholdPolicy.cpp @ 17747:f99e331f6ef6
8029162: G1: Shared SATB queue never enabled
Reviewed-by: brutisso, mgerdin, tschatzl
author | pliden |
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date | Fri, 10 Jan 2014 09:54:25 +0100 |
parents | 487d442ef257 |
children | 63a4eb8bcd23 7150b16fda52 |
rev | line source |
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1783 | 1 /* |
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2 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved. |
1783 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
20 * or visit www.oracle.com if you need additional information or have any | |
21 * questions. | |
22 * | |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "compiler/compileBroker.hpp" | |
27 #include "memory/resourceArea.hpp" | |
28 #include "runtime/arguments.hpp" | |
29 #include "runtime/simpleThresholdPolicy.hpp" | |
30 #include "runtime/simpleThresholdPolicy.inline.hpp" | |
2252 | 31 #include "code/scopeDesc.hpp" |
1783 | 32 |
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33 |
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34 void SimpleThresholdPolicy::print_counters(const char* prefix, methodHandle mh) { |
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35 int invocation_count = mh->invocation_count(); |
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36 int backedge_count = mh->backedge_count(); |
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37 MethodData* mdh = mh->method_data(); |
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38 int mdo_invocations = 0, mdo_backedges = 0; |
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39 int mdo_invocations_start = 0, mdo_backedges_start = 0; |
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40 if (mdh != NULL) { |
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41 mdo_invocations = mdh->invocation_count(); |
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42 mdo_backedges = mdh->backedge_count(); |
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43 mdo_invocations_start = mdh->invocation_count_start(); |
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44 mdo_backedges_start = mdh->backedge_count_start(); |
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45 } |
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46 tty->print(" %stotal=%d,%d %smdo=%d(%d),%d(%d)", prefix, |
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47 invocation_count, backedge_count, prefix, |
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48 mdo_invocations, mdo_invocations_start, |
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49 mdo_backedges, mdo_backedges_start); |
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50 tty->print(" %smax levels=%d,%d", prefix, |
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51 mh->highest_comp_level(), mh->highest_osr_comp_level()); |
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52 } |
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53 |
1783 | 54 // Print an event. |
55 void SimpleThresholdPolicy::print_event(EventType type, methodHandle mh, methodHandle imh, | |
56 int bci, CompLevel level) { | |
57 bool inlinee_event = mh() != imh(); | |
58 | |
59 ttyLocker tty_lock; | |
60 tty->print("%lf: [", os::elapsedTime()); | |
61 | |
62 switch(type) { | |
63 case CALL: | |
64 tty->print("call"); | |
65 break; | |
66 case LOOP: | |
67 tty->print("loop"); | |
68 break; | |
69 case COMPILE: | |
70 tty->print("compile"); | |
2252 | 71 break; |
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72 case REMOVE_FROM_QUEUE: |
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73 tty->print("remove-from-queue"); |
2252 | 74 break; |
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75 case UPDATE_IN_QUEUE: |
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76 tty->print("update-in-queue"); |
2252 | 77 break; |
78 case REPROFILE: | |
79 tty->print("reprofile"); | |
80 break; | |
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81 case MAKE_NOT_ENTRANT: |
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82 tty->print("make-not-entrant"); |
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83 break; |
2252 | 84 default: |
85 tty->print("unknown"); | |
1783 | 86 } |
87 | |
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88 tty->print(" level=%d ", level); |
1783 | 89 |
90 ResourceMark rm; | |
91 char *method_name = mh->name_and_sig_as_C_string(); | |
92 tty->print("[%s", method_name); | |
93 if (inlinee_event) { | |
94 char *inlinee_name = imh->name_and_sig_as_C_string(); | |
95 tty->print(" [%s]] ", inlinee_name); | |
96 } | |
97 else tty->print("] "); | |
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98 tty->print("@%d queues=%d,%d", bci, CompileBroker::queue_size(CompLevel_full_profile), |
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99 CompileBroker::queue_size(CompLevel_full_optimization)); |
1783 | 100 |
101 print_specific(type, mh, imh, bci, level); | |
102 | |
103 if (type != COMPILE) { | |
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104 print_counters("", mh); |
1783 | 105 if (inlinee_event) { |
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106 print_counters("inlinee ", imh); |
1783 | 107 } |
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108 tty->print(" compilable="); |
1783 | 109 bool need_comma = false; |
110 if (!mh->is_not_compilable(CompLevel_full_profile)) { | |
111 tty->print("c1"); | |
112 need_comma = true; | |
113 } | |
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114 if (!mh->is_not_osr_compilable(CompLevel_full_profile)) { |
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115 if (need_comma) tty->print(","); |
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116 tty->print("c1-osr"); |
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117 need_comma = true; |
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118 } |
1783 | 119 if (!mh->is_not_compilable(CompLevel_full_optimization)) { |
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120 if (need_comma) tty->print(","); |
1783 | 121 tty->print("c2"); |
122 need_comma = true; | |
123 } | |
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124 if (!mh->is_not_osr_compilable(CompLevel_full_optimization)) { |
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125 if (need_comma) tty->print(","); |
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126 tty->print("c2-osr"); |
1783 | 127 } |
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128 tty->print(" status="); |
1783 | 129 if (mh->queued_for_compilation()) { |
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130 tty->print("in-queue"); |
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131 } else tty->print("idle"); |
1783 | 132 } |
133 tty->print_cr("]"); | |
134 } | |
135 | |
136 void SimpleThresholdPolicy::initialize() { | |
137 if (FLAG_IS_DEFAULT(CICompilerCount)) { | |
138 FLAG_SET_DEFAULT(CICompilerCount, 3); | |
139 } | |
140 int count = CICompilerCount; | |
141 if (CICompilerCountPerCPU) { | |
142 count = MAX2(log2_intptr(os::active_processor_count()), 1) * 3 / 2; | |
143 } | |
144 set_c1_count(MAX2(count / 3, 1)); | |
145 set_c2_count(MAX2(count - count / 3, 1)); | |
146 } | |
147 | |
148 void SimpleThresholdPolicy::set_carry_if_necessary(InvocationCounter *counter) { | |
149 if (!counter->carry() && counter->count() > InvocationCounter::count_limit / 2) { | |
150 counter->set_carry_flag(); | |
151 } | |
152 } | |
153 | |
154 // Set carry flags on the counters if necessary | |
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155 void SimpleThresholdPolicy::handle_counter_overflow(Method* method) { |
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156 MethodCounters *mcs = method->method_counters(); |
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157 if (mcs != NULL) { |
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158 set_carry_if_necessary(mcs->invocation_counter()); |
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159 set_carry_if_necessary(mcs->backedge_counter()); |
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160 } |
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161 MethodData* mdo = method->method_data(); |
1783 | 162 if (mdo != NULL) { |
163 set_carry_if_necessary(mdo->invocation_counter()); | |
164 set_carry_if_necessary(mdo->backedge_counter()); | |
165 } | |
166 } | |
167 | |
168 // Called with the queue locked and with at least one element | |
169 CompileTask* SimpleThresholdPolicy::select_task(CompileQueue* compile_queue) { | |
170 return compile_queue->first(); | |
171 } | |
172 | |
2252 | 173 void SimpleThresholdPolicy::reprofile(ScopeDesc* trap_scope, bool is_osr) { |
174 for (ScopeDesc* sd = trap_scope;; sd = sd->sender()) { | |
175 if (PrintTieredEvents) { | |
176 methodHandle mh(sd->method()); | |
177 print_event(REPROFILE, mh, mh, InvocationEntryBci, CompLevel_none); | |
178 } | |
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179 MethodData* mdo = sd->method()->method_data(); |
2252 | 180 if (mdo != NULL) { |
181 mdo->reset_start_counters(); | |
182 } | |
183 if (sd->is_top()) break; | |
184 } | |
185 } | |
186 | |
1783 | 187 nmethod* SimpleThresholdPolicy::event(methodHandle method, methodHandle inlinee, |
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188 int branch_bci, int bci, CompLevel comp_level, nmethod* nm, JavaThread* thread) { |
1783 | 189 if (comp_level == CompLevel_none && |
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190 JvmtiExport::can_post_interpreter_events() && |
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191 thread->is_interp_only_mode()) { |
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192 return NULL; |
1783 | 193 } |
194 nmethod *osr_nm = NULL; | |
195 | |
196 handle_counter_overflow(method()); | |
197 if (method() != inlinee()) { | |
198 handle_counter_overflow(inlinee()); | |
199 } | |
200 | |
201 if (PrintTieredEvents) { | |
202 print_event(bci == InvocationEntryBci ? CALL : LOOP, method, inlinee, bci, comp_level); | |
203 } | |
204 | |
205 if (bci == InvocationEntryBci) { | |
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206 method_invocation_event(method, inlinee, comp_level, nm, thread); |
1783 | 207 } else { |
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208 method_back_branch_event(method, inlinee, bci, comp_level, nm, thread); |
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209 // method == inlinee if the event originated in the main method |
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210 int highest_level = inlinee->highest_osr_comp_level(); |
1783 | 211 if (highest_level > comp_level) { |
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212 osr_nm = inlinee->lookup_osr_nmethod_for(bci, highest_level, false); |
1783 | 213 } |
214 } | |
215 return osr_nm; | |
216 } | |
217 | |
218 // Check if the method can be compiled, change level if necessary | |
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219 void SimpleThresholdPolicy::compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread) { |
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220 assert(level <= TieredStopAtLevel, "Invalid compilation level"); |
1783 | 221 if (level == CompLevel_none) { |
222 return; | |
223 } | |
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224 // Check if the method can be compiled. If it cannot be compiled with C1, continue profiling |
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225 // in the interpreter and then compile with C2 (the transition function will request that, |
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226 // see common() ). If the method cannot be compiled with C2 but still can with C1, compile it with |
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227 // pure C1. |
1783 | 228 if (!can_be_compiled(mh, level)) { |
229 if (level == CompLevel_full_optimization && can_be_compiled(mh, CompLevel_simple)) { | |
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230 compile(mh, bci, CompLevel_simple, thread); |
1783 | 231 } |
232 return; | |
233 } | |
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234 if (bci != InvocationEntryBci && mh->is_not_osr_compilable(level)) { |
1783 | 235 return; |
236 } | |
237 if (!CompileBroker::compilation_is_in_queue(mh, bci)) { | |
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238 if (PrintTieredEvents) { |
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239 print_event(COMPILE, mh, mh, bci, level); |
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240 } |
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241 submit_compile(mh, bci, level, thread); |
1783 | 242 } |
243 } | |
244 | |
245 // Tell the broker to compile the method | |
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246 void SimpleThresholdPolicy::submit_compile(methodHandle mh, int bci, CompLevel level, JavaThread* thread) { |
1783 | 247 int hot_count = (bci == InvocationEntryBci) ? mh->invocation_count() : mh->backedge_count(); |
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248 CompileBroker::compile_method(mh, bci, level, mh, hot_count, "tiered", thread); |
1783 | 249 } |
250 | |
251 // Call and loop predicates determine whether a transition to a higher | |
252 // compilation level should be performed (pointers to predicate functions | |
253 // are passed to common() transition function). | |
254 bool SimpleThresholdPolicy::loop_predicate(int i, int b, CompLevel cur_level) { | |
255 switch(cur_level) { | |
256 case CompLevel_none: | |
257 case CompLevel_limited_profile: { | |
258 return loop_predicate_helper<CompLevel_none>(i, b, 1.0); | |
259 } | |
260 case CompLevel_full_profile: { | |
261 return loop_predicate_helper<CompLevel_full_profile>(i, b, 1.0); | |
262 } | |
263 default: | |
264 return true; | |
265 } | |
266 } | |
267 | |
268 bool SimpleThresholdPolicy::call_predicate(int i, int b, CompLevel cur_level) { | |
269 switch(cur_level) { | |
270 case CompLevel_none: | |
271 case CompLevel_limited_profile: { | |
272 return call_predicate_helper<CompLevel_none>(i, b, 1.0); | |
273 } | |
274 case CompLevel_full_profile: { | |
275 return call_predicate_helper<CompLevel_full_profile>(i, b, 1.0); | |
276 } | |
277 default: | |
278 return true; | |
279 } | |
280 } | |
281 | |
282 // Determine is a method is mature. | |
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283 bool SimpleThresholdPolicy::is_mature(Method* method) { |
1783 | 284 if (is_trivial(method)) return true; |
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285 MethodData* mdo = method->method_data(); |
1783 | 286 if (mdo != NULL) { |
287 int i = mdo->invocation_count(); | |
288 int b = mdo->backedge_count(); | |
289 double k = ProfileMaturityPercentage / 100.0; | |
290 return call_predicate_helper<CompLevel_full_profile>(i, b, k) || | |
291 loop_predicate_helper<CompLevel_full_profile>(i, b, k); | |
292 } | |
293 return false; | |
294 } | |
295 | |
296 // Common transition function. Given a predicate determines if a method should transition to another level. | |
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297 CompLevel SimpleThresholdPolicy::common(Predicate p, Method* method, CompLevel cur_level) { |
1783 | 298 CompLevel next_level = cur_level; |
299 int i = method->invocation_count(); | |
300 int b = method->backedge_count(); | |
301 | |
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302 if (is_trivial(method)) { |
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303 next_level = CompLevel_simple; |
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304 } else { |
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305 switch(cur_level) { |
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306 case CompLevel_none: |
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307 // If we were at full profile level, would we switch to full opt? |
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308 if (common(p, method, CompLevel_full_profile) == CompLevel_full_optimization) { |
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309 next_level = CompLevel_full_optimization; |
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310 } else if ((this->*p)(i, b, cur_level)) { |
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311 next_level = CompLevel_full_profile; |
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312 } |
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313 break; |
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314 case CompLevel_limited_profile: |
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315 case CompLevel_full_profile: |
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316 { |
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317 MethodData* mdo = method->method_data(); |
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318 if (mdo != NULL) { |
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319 if (mdo->would_profile()) { |
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320 int mdo_i = mdo->invocation_count_delta(); |
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321 int mdo_b = mdo->backedge_count_delta(); |
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322 if ((this->*p)(mdo_i, mdo_b, cur_level)) { |
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323 next_level = CompLevel_full_optimization; |
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324 } |
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325 } else { |
2252 | 326 next_level = CompLevel_full_optimization; |
327 } | |
1783 | 328 } |
329 } | |
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330 break; |
1783 | 331 } |
332 } | |
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333 return MIN2(next_level, (CompLevel)TieredStopAtLevel); |
1783 | 334 } |
335 | |
336 // Determine if a method should be compiled with a normal entry point at a different level. | |
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337 CompLevel SimpleThresholdPolicy::call_event(Method* method, CompLevel cur_level) { |
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338 CompLevel osr_level = MIN2((CompLevel) method->highest_osr_comp_level(), |
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339 common(&SimpleThresholdPolicy::loop_predicate, method, cur_level)); |
1783 | 340 CompLevel next_level = common(&SimpleThresholdPolicy::call_predicate, method, cur_level); |
341 | |
342 // If OSR method level is greater than the regular method level, the levels should be | |
343 // equalized by raising the regular method level in order to avoid OSRs during each | |
344 // invocation of the method. | |
345 if (osr_level == CompLevel_full_optimization && cur_level == CompLevel_full_profile) { | |
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346 MethodData* mdo = method->method_data(); |
1783 | 347 guarantee(mdo != NULL, "MDO should not be NULL"); |
348 if (mdo->invocation_count() >= 1) { | |
349 next_level = CompLevel_full_optimization; | |
350 } | |
351 } else { | |
352 next_level = MAX2(osr_level, next_level); | |
353 } | |
354 | |
355 return next_level; | |
356 } | |
357 | |
358 // Determine if we should do an OSR compilation of a given method. | |
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359 CompLevel SimpleThresholdPolicy::loop_event(Method* method, CompLevel cur_level) { |
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360 CompLevel next_level = common(&SimpleThresholdPolicy::loop_predicate, method, cur_level); |
1783 | 361 if (cur_level == CompLevel_none) { |
362 // If there is a live OSR method that means that we deopted to the interpreter | |
363 // for the transition. | |
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364 CompLevel osr_level = MIN2((CompLevel)method->highest_osr_comp_level(), next_level); |
1783 | 365 if (osr_level > CompLevel_none) { |
366 return osr_level; | |
367 } | |
368 } | |
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369 return next_level; |
1783 | 370 } |
371 | |
372 | |
373 // Handle the invocation event. | |
374 void SimpleThresholdPolicy::method_invocation_event(methodHandle mh, methodHandle imh, | |
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375 CompLevel level, nmethod* nm, JavaThread* thread) { |
1783 | 376 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh, InvocationEntryBci)) { |
377 CompLevel next_level = call_event(mh(), level); | |
378 if (next_level != level) { | |
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379 compile(mh, InvocationEntryBci, next_level, thread); |
1783 | 380 } |
381 } | |
382 } | |
383 | |
384 // Handle the back branch event. Notice that we can compile the method | |
385 // with a regular entry from here. | |
386 void SimpleThresholdPolicy::method_back_branch_event(methodHandle mh, methodHandle imh, | |
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387 int bci, CompLevel level, nmethod* nm, JavaThread* thread) { |
1783 | 388 // If the method is already compiling, quickly bail out. |
389 if (is_compilation_enabled() && !CompileBroker::compilation_is_in_queue(mh, bci)) { | |
390 // Use loop event as an opportinity to also check there's been | |
391 // enough calls. | |
392 CompLevel cur_level = comp_level(mh()); | |
393 CompLevel next_level = call_event(mh(), cur_level); | |
394 CompLevel next_osr_level = loop_event(mh(), level); | |
395 | |
396 next_level = MAX2(next_level, | |
397 next_osr_level < CompLevel_full_optimization ? next_osr_level : cur_level); | |
398 bool is_compiling = false; | |
399 if (next_level != cur_level) { | |
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400 compile(mh, InvocationEntryBci, next_level, thread); |
1783 | 401 is_compiling = true; |
402 } | |
403 | |
404 // Do the OSR version | |
405 if (!is_compiling && next_osr_level != level) { | |
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406 compile(mh, bci, next_osr_level, thread); |
1783 | 407 } |
408 } | |
409 } |